Direct-current turbo-generator.



A. H. WOUTERS. DIRECT CURRENT TURBO GENERATOR.

20 Y Y QA bQ/b lumen. wasmwmx APPLICATION FILED NOV. 3, 1906.

Patented Aug. 31, 1909.

TnvevXo/v Wed M. Wm/Maw P UN gTATES PATEN iou v r r ALFRED El. VJOUTERS,0F ZIOBWOOID, OHIO, ASSIGNGE T0 ALLIS-CHALMERS COMPANY, A 003.1 0-

BAEION 02 NEW JERSEY, AND THE BULLOCK ELECTRIC IPZANUFAGTURZNG- CUE-IPAPOEATZON OF OHIO.

DIRECT-GURREIJT TURBO-GE NERATOR.

Specification of Letters Patent.

Application filed November 3, 1906.

Serial No. 341,816.

To all whom it may concern:

Be it known that I, irm nnn H. lVoUTnns, belonging to the Kingdom of theNetherlands, residing at llorwood, in the county of Hamilton and Stateof Ohio, have invented certain new and useful Improvements inDirect-Current Turbo-Generators, of which the following is a full,clear, and exact specification.

My invention relates to direct-current dynamo-electric machines,particularly to high speed machines such as turbo-generators.

in high speed direct-current machines, the number of poles andconsequently the munber of brush-studs is comparatively small, with theresult that long commutators are required to obtain the necessary brushcontact surface. T he commutator bars in high speed machines are usuallyheld in position by a plurality of clamping rings, spaced about equallyover the commutator length. The space occupied by these rings is considarable, and therefore cause the commutator and hence the entire machineto be materi a My lengthened.

'ihe commutator leads or necks have heretofore been connected to theends of the bars, and the rings have heretofore all been located at oneside of the commutator leads, the latter being between the armature coreand the first ring adjacent thereto.

in assembling the commutator, the commutator leads or necks are firstsecured to the bars, preferably b Y riveting and the bars are thentemporarily secured together by clamping means. The insulation for separating the bars from the clamping rings is then placed on the bars andcarefully baked. The rings are then placed into position one at a time,from the end of the commutator opposite the leads or necks. It is rathera difiicult matter to place the first rings in position by moving themlengthwise of the bars from the end opposite the commutator leads,without injuring the insulation which is to separate the other ringsfrom the bars.

The laminae of the core are usually clamped between endmembers, of whichthe one adjacent the commutator is usually held in position by ashoulder on the shaft, the other being held in position by a splitclamping ring, hat, or other device. The

ends of the commutator bars adjacent the armature core are usuallysupported on an inclined and insulated portion of the shaft, theshoulder above referr d to and the inclined portion of the shaft forminga part of an enlargement of the shaft, or the commntator tars aresupported on a conical sleeve, the sleeve abutting against a secondshoulder on the shaft. The shoulder and inclined portion of the shaft,or the two shoulders, as the case may be, necessitate a much largerforging for the shaft than would otherwise be required if the should andinclined portion, or shoulders could be dis pensed with, and necessitateconsiderable machining, increasing materially the cost of the machine.

One of the objects of my invention is to provide a more compact machineby decreasing its length and hence the floor space here tofore required.

A further obj cct is to provide a commutator of such a construction thatthe rings which surround the bars can more easily be placed in positionand without so much danger of injuring the insulation.

A still further object is to provide means whereby a cheaper shaft canbe employed.

In carrying out the first and second objects of my invention aboveenumerated, in stead of connecting the commutator leads or necks to theends of the bars and placing the rings all at one side of these leads, 1connect the leads or necks to the bars a short distance from their ends,so as to leave sulficient space between the ends of the bars and theleads for one of the clamping rings. lVith this construction the ringadjacent the commutator leads an be slipped into position from one endof the commutator and the other rings from the other end of thecommutator. Furthermore with this construction, a portion of thecommutator bars and the ring adjacent the commutator leads are locatedwithin the annular shoulder of the bracket which supports the ends ofthe armature coils. This space within the annular shoulder, in machinesas heretofore constructed, is unoccupied and therefore is a dead waste.

In carrying out the third object of my invention, I provide a supportfor the ends of I, A COR- the commutator bars, and provide for thissupport and the adjacent end -clamp1ng member for the armature a singleabutment consisting preferably of a split ring located in a groove inthe shaft between said supportand end-member.

My invention still further conslsts 1n novel details of construction andcombinations and arrangements of parts described in the specificationand set forth in the appended claims.

F or a better understanding of my invention, reference is had to theaccompany ng drawings forming a part of thls application in which Figure1 is a partial longitudinal sectional elevation of a machine equippedwith my 1nvention; and Fig. 2 is an isometric projection of a portion ofthe commutator including the commutator necks or leads, parts beingbroken away.

Referring now to the figures of the drawing, 1 have shown at 10 anarmature of a high speed direct current machine and at 11 a commutator,both being mounted on the shaft 12. The armature is adapted to rotatewithin a field member consisting of a yo e 13 and field magnets 14. Thearmature consists of laminae 15 clamped between endmembers one of whichis shown at 16, which end-member 1-3 is provided with an annularshoulder or bracket 17 for supporting the ends of the coils. Theend-member abuts against and is retained in position, in this case, by asplit clamping ring 18 which is located in a groove in the shaft andextends outward beyond the surface of the shaft. This ring may consistof one or several parts. The core is slotted and provided with a windingconsisting of coils which project beyond each end of the core, theprojecting portions resting on the annular shoulders or brackets of theend-members being held thereto by band-wire 19. The commutator 11consists of long bars surrounded by clamping rings 20, 21 and 22 whichare sepa rated from the bars by insulation 20 21 and 22 respectively.The rings are preferably shrunk over the bars, although they may bepressed on or brought into position in any other desired manner.

The commutator bars are connected to the coils by radial commutatorleads or necks 23, the leads being preferably riveted and soldered tothe bars and soldered to the coils. It will be seen that the commutatorleads are connected to the bars, not at the ends thereof as incommutators heretofore constructed for machines of this type, but at ashort distance from the ends, the ends at the left of the leads 23 beinglocated within the annular shoulder or bracket 17 of the endmember 16and extending inwardly to a point adjacent the end-member. By connectingthe commutator leads to the bars sliown, I am able to "place the ring 20on the commutator at the left of the commutator leads or between theleads and the armature core, and therefore also within the overhangingannular shoulder or bracket 17.- In this case the ends of the bars aresupported on a conial sleeve 24:, being separated therefrom byinsulation 25 and from a shoulder 2-1 of the sleeve by a fiber ring 26It is seen that the insulation 20 extends from the fiber ring 26 to thecommutator leads. The sleeve 2% is provided with a shoulder 27 and witha portion which overhangs the split ring. Thus the split ring 18 servesas an abutment for the supporting sleeve 24 as well as for theend-clamping member 16. it is also seen that the oi 'erhanging portionof the sleeve 2st prevents displacement of the split ring. The shoulder27 of the supporting sleeve 24- is in this case separated from theend-member 16 by a ring or washer 28. This ring 28 serves merely as acushion between the armature and commutator. It may be. omitted, and ifdesired a small clearance left between the end member 16 and sleeve Itis seen that with this construction the machine is considerablyshortened, since a por tion of the commutator including the ends of thebars and the ring 18 are located within the heretofore unoccupied spacewithin the overhanging shoulder or bracket 17.

The rin 2 can be placed on the commutator from the end at the left ofthe leads or necks thus avoiding the danger of injuring the insulation21 and 22. If desired, to avoid danger of injury to the insulation 22when ring 21 is placed into position, the outer end of the commutatorcover-ed by the insulation 22* may be slightly less in diameter than themain portion of the comnuitator. I have in this case shown only threeclamping rings but more than three may be employed if necessary.Furthermore, since the ends of the connnutator bars are adjacent theend-member 16, a single abutment, in this case the clamping ring 18, canbe employed both for the end-member 16 and for the sleeve 2% whichsupports the ends of the bars, avoiding the use of shoulders or otherenlargements of the shaft and permitting the use of a shaft of uniformdiameter from the outer end of the armature to the outer end of thecommutator, thereby materially decreasing the cost of the shaft.However, I do not wish to be confined to the use of a supporting sleeve24 and a split clamping ring as an abutment. If desired, any other formof abutment or abutments for the end-member and support for the ends ofthe bars may be employed without inter fering with the other features ofmy invention.

I do not wish to be confined to the exact details shown but aim in myclaims to cover all such obvious modifications and changes which do notinvolve a departure from the spirit and scope of my invention as setforth in the appended claims.

What I claim as new and desire to secure by Letters Patent is 1. In anarmature of a dynamo-electric machine, a shaft, a laminated core, anendmember therefor, a commutator, a sleeve supporting the ends of thecommutator bars, said shaft having a groove between said end-member andsleeve, and a ring located in said groove and extending above thesurface of the shaft, said ring forming an abutment for said end-memberand sleeve.

2. In a dynamo-electric machine, a shaft having a groove, a splitclamping ring located in said groove and extending beyond the surface ofsaid shaft, a laminated core, an endclamping member therefor, acommutator, and a sleeve supporting the ends of the commutator bars,said end-members and sleeve being on opposite sides of and bearingagainst said clampingring, said sleeve having a portion extending overthe ring to prevent its displacement.

3. A. commutator of a dynamo-electric machine, comprising a plurality ofradial bars insulated from each other and having straight outer edgesthroughout their length, commutator leads connected to said barsintermediate their ends, and a plurality of shrink-rings surroundingsaid bars but insulated therefrom, one of said shrink-rings beinglocated adjacent to said commutator leads at one side thereof, andanother of said shrink-rings being located on the other side of saidleads.

4. In a dynamo-electric machine, an armature comprising a core, coils,and an endclamping member for said core, said endmember having anoutwardly extending shoulder or bracket supporting the ends of thecoils, a commutator, commutator leads or necks connecting the coils andcommutator bars, said bars extending under said shoulder or bracket, anda clamping-ring surrounding the ends of the commutator bars and beingindependent of the internal support for said commutator and locatedbetween said leads or necks and the core.

5. In a dynamo-electric machine, an armature comprising a core, coils,and an endclamping member for said core, said endmember having anoutwardly extending annular shoulder or bracket supporting the ends ofthe coils, a commutator, commutator leads or necks connecting the coilsand commutator bars, the ends of said bars being within said annularshoulder adjacent said end-member, and a member acting as a com monabutment for said end-member and commutator bars.

6. In a dynamo-electric machine, an armature comprising a core, coils,and an endclamping member for said core, said endmember having anoutwardly extending annular shoulder or bracket supporting the ends ofthe coils, a commutator, commutator leads or necks connecting the coilsand com niutator bars, a shrink-ring surroui'iding the commutator at theend adjacent the armature, said shrink-ring being between the armatureand commutator necks within the annular shoulder or bracket on saidendmember.

7. In a dynamo-electric machine, an armature comprising a laminatedcore, coils, and an end-clamping member for the laminae, said end-memberhaving an annular shoulder or bracket supporting the ends of the coils,a commutator comprising bars partially within said annular shoulder orbracket, a supporting sleeve for the ends of the bars, said sleeve beingadjacent the end-member, and a single abutment for the sleeve andend-member.

In testimony whereof I ailix my signature, in the presence of twowitnesses.

ALFRED II. VVOUTERS.

Witnesses:

ARTHUR F. Kwis, GEO. B. SCHLEY.

